Milk-can.



L. STURGES.

MILK CAN.

APPLICATION FILED NOV. 22, 1913.

Patented Nov. 23, 1915.

l l 7' IHII LEE STURGES, OF CHICAGO, ILLINOIS.

MILK-CAN.

Application filed November 22, 1913.

To all whom it may concern:

Be it known that I, LEE ST'URGES, a citizen of the United States, and aresident of the city of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inMilk-Cans; and I do hereby declare that the following is a full, clear,and exact descriptlon of the same, reference being had to theaccompanying drawings, and to the numerals of reference marked thereon,which form a part of this specification.

Milk and cream is often caused to spoil or become sour during thetransfer thereof from place to place if the cans or receptaclescontaining the milk or cream, are not kept in a properly cooled place.

This invention relates to a milk can construction wherein suitablethermal insulation is provided associated with the canto protect thecontents thereof from exterior temperature changes and to maintaln thecontents at substantially the same temperature as when placed within thecan.

It is an object of this invention to construct a double Walled milk canin which the space between said walls is filled with a non-conductingmaterial serving to insulate the interior of the can from the variousheat changes on the exterior thereof.

It is also an object of this invention to provide a milk can consistingsubstantially of two separate cans, one placed within the other andspaced therefrom, thus affording a construction capable of maintainingthe contents within the inner can at substantially a constanttemperature irrespective of exterior temperature conditions.

It is also an object of this invention to construct a thermallyinsulated can provided with an insulating cover adapted to be clampedtightly thereon and with means affording an insulating dead air spacebetween the cover and the contents of the can.

It is also an object of this invention to provide a heat insulatingcontainer provided with an insulating cover curved to fit into acomplementally curved opening in the container, such that inclination ofthe cover in the opening will not affect the sealing function thereof.

It is furthermore an object of this invention to construct a heatinsulated container for milk or other fluids, provided with an insulatedhead or cover, adapted to be Specification of Letters Patent.

Patented Nov. 23, 1915.

Serial No. 802,369.

clamped in tight relation thereon to close the same.

It is finally an object of this invention to provide a thermallyinsulated container of a simple construction to preserve the contents ofthe container at a constant predetermined temperature.

The invention (in a preferred form) is hereinafter more fully describedand defined in the accompanying drawings and specificatlon. 4

In the drawings: Figure 1 is a front elevatlon of a can partly brokenaway, and shown in section. Fig. 2 is an enlarged, fragmentary sectionalview of the upper portion of the device, illustrating the constructionin detail. Fig. 3 is a front face view of a Wedge or key, two or more ofwhich are secured upon the outer periphery of the neck of the can. Fig.4 is an inner face view of a portion of the cover for the device,illustrating one of the grooved or slotted members adapted to cotiperatewith the key members to lock the cover on the device.

As shown in the drawings: 1, indicates the outer wall of a container orcan, having soldered, welded or riveted thereto, as desired, an inwardlyconcave bottom 2, and an outwardly convex breast member 3. Mountedwithin the can is an interior similarly shaped can having side walls 4,an inwardly concave bottom member 5, and a convex breast member 6,similar to the member 3, and adjacent thereto, said respective members4, 5, and 6, being connected to one another by soldering or othersuitable means, as desired. Said breast members 3 and 6, of the outerand inner can members respectively, are closed or joined at their uppermargins by the mouthpiece member 7, affording the neck of the assembledstructure. Said member 7, at one of its edges extends inwardly beneaththe breast 3, and is soldered thereto, and at its other edge, is flangedinwardly over and around an inturned portion of the element 6, thusaffording an inner peripheral flange 8, and a continuous groove orrecess 8 within the can.

A cover 9, adapted to fit over the mouth piece of the can and extenddownwardly around the neck thereof, has secured on the under surfacethereof an upwardly facing cup 10, which fits within the mouth piece ofthe device to seal the same. The walls of the cup 10, and the innerwalls of the mouthpiece 7, are complementally curved, the convexity ofthe cup and the concavity of the mouthpiece being spherical and of aradius equal substantially to the mean radius of the opening through themouthpiece. This affords practically a ball and socket connection andpermits the cover to be moved or inclined at different degrees relativethe can without impairing the sealing effect thereof.

Any desired insulating material 11, such as ground cork, felt or thelike, is packed in the space between the inner and outer containermembers and also within the cup 10, secured on the cover, so that arelatively thick wall of insulation entirely surrounds the contents ofthe can. In order to properly space theinner can from the outer canduring the assembly thereof, wood or fiber or other non-conductingmaterials in the forms of small-ring segment blocks 12, are placed onthe bottom of the outer can adapting the inner can to' rest thereon andto be properly centered prior to the introduction of the insulatingpacking 11.

For the purpose of closing the cover tightly upon the can, a air ofwedgeshaped key members 13, are provided on the outer surface of the neck 7,and are adapted to cooperate with a pair of complemental members 14,having wedge shaped grooves or slots therein and secured on the innerperiphery of the outer depending flange of the cover 9, so that afterthe positioning of the cover upon the device, partial rotation thereofabout its vertical axis not only serves to engage the same tightly onthe opening in the can, but to retain the same thereon until purposelyreleased by a reverse rotary movement thereof. The purpose of theinturned flange 8, and groove 8, on the interior of the mouthpiece, isto receive a card or paper blank 15. thus affording an air space beneaththe cover and sealingthe contents of the can from dust or other foreignmatter which might find its way into the contents of the can when thecover 9, is removed.

A bumper ring 16, is provided around the exterior of the can at thejunction of the outer side walls and breast member to reinforce the sameand protect the can in handling.-

In this invention every precaution has been taken to avoid and prevent atransfer of heat between the inner canand the outer can. Only onemetallic connection exists Y the inner can, the heat would otherwise bequickly conducted thereto.

I am aware that various details of construction may be varied through awide range without departing from the principles of this invention. Itherefore do not purpose limiting the patent granted otherwise thannecessitated by the prior art.

I claim as my invention:

1. In a device of the class described, a can, a mouth-piece, and a covertherefor, said mouth-piece and cover being complementally curved topermit, interfitting when the axis of said cover is angled with respectto the axis of said mouth-piece without impairing the sealing effectthereof.

2. A milk can comprising inner and outer walls spaced from one another,a filling of heat insulating material therebetween, a

non-conducting cover adapted to close the open end of the device andshaped complementally with said open end to afford an adjustable balland socket connection, and

locking means engaged on the can and cover adapted to cooperate tomaintain the 'cover thereon.

3. In a device of the class described, an inner and outer containerspaced one from another, a filling of insulating materialtherebetween,said inner container at its upper end being flanged inwardly, amouthpiece secured to said outer container and flanged inwardly. oversaid inturned portion of said inner container affording an innerperipheral groove and flange, and an insulating member sprung into saidgroove and resting on said flange, affording a closed air space in saidmouth-piece.

In testimony whereof I have hereunto.

subscribed mv name in the presence of two subscribing witnesses.

LEE STURGES.

